Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ed91b321787e9ff04c4cbcc5fcb7ef9f35d37b8a6006cc9cc633076e317b788' 
  AND token = '6fjyiTlQWsaMInTK3+nH4ro/OWMi1cxcqGl7uoVEzwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}